package cn.gov.application;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.URL;
import java.net.URLConnection;

import javax.servlet.http.HttpServletRequest;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.context.config.annotation.RefreshScope;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RefreshScope
@SpringBootApplication
@EnableDiscoveryClient
public class ApplicationA {
	
	@Value("${server.port}")
	String port;
	
	@Value("${app}")
	String appName;
	
	
	public static void main(String[] args) {
		SpringApplication.run(ApplicationA.class, args);
	}

	@RequestMapping("/test")
	public String test(@RequestParam String name) {
		return "hello,my name is 【" + name + "】,and i am from port:【" + port +"】 =====>"+ appName;
	}
	
	@RequestMapping("/refresh1")
	public String refreshConfig(HttpServletRequest request) {
		String domain = request.getScheme()+"://"+ request.getServerName()+":"+request.getServerPort();
		String result = doPost(domain+"/refresh","");
		return result;
	}
	
	@RequestMapping("/busRefresh")
	public String refreshConfig2(HttpServletRequest request) {
		String name = request.getParameter("name");
		String domain = request.getScheme()+"://"+ request.getServerName()+":"+request.getServerPort();
		String requestResource = domain+"/bus/refresh";
		if(!StringUtils.isEmpty(name)){
			requestResource = domain+"/bus/refresh?destination="+name+":**";
		}
		String result = doPost(requestResource,"");
		return result;
	}
	
	private static String doPost(String url, String param){
		PrintWriter out = null;
        BufferedReader in = null;
        String result = "";
        try {
            URL realUrl = new URL(url);
            // 打开和URL之间的连接
            URLConnection conn = realUrl.openConnection();
            // 设置通用的请求属性
            conn.setRequestProperty("accept", "*/*");
            conn.setRequestProperty("connection", "Keep-Alive");
            conn.setRequestProperty("user-agent",
                    "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            // 发送POST请求必须设置如下两行
            conn.setDoOutput(true);
            conn.setDoInput(true);
            // 获取URLConnection对象对应的输出流
            out = new PrintWriter(conn.getOutputStream());
            // 发送请求参数
            out.print(param);
            // flush输出流的缓冲
            out.flush();
            // 定义BufferedReader输入流来读取URL的响应
            in = new BufferedReader(
                    new InputStreamReader(conn.getInputStream()));
            String line;
            while ((line = in.readLine()) != null) {
                result += line;
            }
        } catch (Exception e) {
            System.out.println("发送 POST 请求出现异常！"+e);
            e.printStackTrace();
        }
        //使用finally块来关闭输出流、输入流
        finally{
            try{
                if(out!=null){
                    out.close();
                }
                if(in!=null){
                    in.close();
                }
            }
            catch(IOException ex){
                ex.printStackTrace();
            }
        }
        return result;
    }
	
}
